Gil (Gillian Chung) is a girl who tries to take her own life after being dumped by her boyfriend for another girl, Brenda (Chrissie Chow). Gil gets rescued by a water deity, and believes she has received special powers. Even though she doesn't even know how to swim she enters the Fantastic Water Babes swimming competition, in an vengeful effort to compete against her romantic rival and her friends, and to get back her boyfriend. To master swimming she kidnaps swimming champion Kwok Chi Yuan (Alex Fong Lik Sun) to the island of Cheung Chau, to make him teach her and her friends how to swim.
| Actor | Role |
|---|---|
 Gillian ChungGillian Law Kiu | Gillian Law Kiu |
 Alex Fong Lik-SunKwok Chi Yuan | Kwok Chi Yuan |
 Huang ShengyiJade/Yuk | Jade/Yuk |
 Hyper BBFlorence | Florence |
| CChu FunFlora | Flora |
 Simon Lui Yu-YeungCheng Cheong | Cheng Cheong |
 Stephen FungHanna | Hanna |
 Tian LiangWater Guan Yin | Water Guan Yin |
 Natalie Tong Sze-WingHelen | Helen |
| JJanet MaMay Cheng | May Cheng |
 Chrissie Chau Sau-NaBrenda | Brenda |
| CCalvin SunRamsy | Ramsy |
 Jacqueline Law Wai-GuenMrs Fung | Mrs Fung |
| LLiu Chui-ChunDragon granny/Auntie Lung | Dragon granny/Auntie Lung |
 Sam Ho Choi-ChowBoss Chu | Boss Chu |
 Jeffrey Lau Chun-WaiMan responsible for Hanna's father death | Man responsible for Hanna's father death |
| AAu Wai-LunRoll Caller | Roll Caller |
 Che Jan-BongNot listed | Not listed |
| CChan KungKong Chai | Kong Chai |
 Patrick DunnNot listed | Not listed |